diff --git a/keyboards/qwertyydox/config.h b/keyboards/qwertyydox/config.h
index b22ca534e3e..a685652230a 100644
--- a/keyboards/qwertyydox/config.h
+++ b/keyboards/qwertyydox/config.h
@@ -49,6 +49,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Set 0 if debouncing isn't needed */
 #define DEBOUNCING_DELAY 5
 
+/* serial.c configuration for split keyboard */
+#define SOFT_SERIAL_PIN D0
+
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
diff --git a/keyboards/qwertyydox/rev1/config.h b/keyboards/qwertyydox/rev1/config.h
index 3d4c9b0d000..a2557592d3e 100644
--- a/keyboards/qwertyydox/rev1/config.h
+++ b/keyboards/qwertyydox/rev1/config.h
@@ -49,6 +49,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Set 0 if debouncing isn't needed */
 #define DEBOUNCING_DELAY 5
 
+/* serial.c configuration for split keyboard */
+#define SOFT_SERIAL_PIN D0
+
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
diff --git a/quantum/split_common/split-keyboards-list.txt b/quantum/split_common/split-keyboards-list.txt
index d8f9ffb1826..bd9a0fce618 100644
--- a/quantum/split_common/split-keyboards-list.txt
+++ b/quantum/split_common/split-keyboards-list.txt
@@ -12,7 +12,7 @@ ok keyboards/levinson/rules.mk:SPLIT_KEYBOARD = yes
 ok keyboards/miniaxe/rules.mk:SPLIT_KEYBOARD = yes        # Use shared split_common code
 ok keyboards/nyquist/rules.mk:SPLIT_KEYBOARD = yes
 ok keyboards/quefrency/rules.mk:SPLIT_KEYBOARD = yes
-keyboards/qwertyydox/rules.mk:SPLIT_KEYBOARD = yes
+ok keyboards/qwertyydox/rules.mk:SPLIT_KEYBOARD = yes
 keyboards/redox/rules.mk:SPLIT_KEYBOARD = yes
 keyboards/rorschach/rules.mk:SPLIT_KEYBOARD = yes